Question

I have the following MySQL code:

SELECT COUNT(e.eid) AS cnt, e.c_id, c.cdesc 
FROM e 
JOIN c on c.c_id = e.c_id 
GROUP by c.c_id

Unfortunately the count does not take into account rows which are 0, so for example c_id may have 10 rows but only 9 are displayed (because one of the e_id‘s count is zero).

I have tried both LEFT JOIN and RIGHT JOIN with no success. Does anyone have any other suggestions?

Answer 1

I suspect that what you need is this:

SELECT COUNT(*) AS cnt, c.c_id, c.cdesc 
FROM c 
LEFT JOIN e on c.c_id = e.c_id 
GROUP by c.c_id